EP0343342A1 - Fastener with an expanding sleeve - Google Patents
Fastener with an expanding sleeve Download PDFInfo
- Publication number
- EP0343342A1 EP0343342A1 EP89105407A EP89105407A EP0343342A1 EP 0343342 A1 EP0343342 A1 EP 0343342A1 EP 89105407 A EP89105407 A EP 89105407A EP 89105407 A EP89105407 A EP 89105407A EP 0343342 A1 EP0343342 A1 EP 0343342A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- expansion sleeve
- sleeve
- expanding sleeve
- shaft
- expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007704 transition Effects 0.000 claims 1
- 229910000639 Spring steel Inorganic materials 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/065—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting the screw, nail or the like
Definitions
- the invention relates to a fastener with an expansion sleeve according to the preamble of the main claim.
- a fastening element with an expanding sleeve is known, which is suitable for self-clamping fastening in boreholes.
- the fastening element has a shaft on which an expansion sleeve is placed, which in the unloaded state projects slightly beyond the shaft diameter.
- the expansion sleeve can be compressed resiliently when inserted into a borehole, whereby it braces against the borehole wall. When driving in, the frictional force caused by the elastic tension must therefore be overcome. It can happen that the shaft part adjoining the expansion sleeve inadvertently pushes partially under the expansion sleeve, in particular when the expansion sleeve lies slightly tilted against the shoulder formed by this shaft part.
- the invention has for its object to design the expansion sleeve designed as a spring sleeve so that it rests securely on the adjacent shaft part when driving into a borehole.
- Inwardly angled tabs are formed on the expansion sleeve, which rest securely on a shoulder of the shaft when the fastening element is driven in.
- the expansion sleeve is tapered in this area by the inwardly bent tabs, which ensures that the expansion sleeve does not overlap over the adjacent shoulder area of the shaft, even in the case of irregularly extending drill holes.
- the inwardly bent tabs have the advantage that the expansion sleeve tries to bulge outwards when driven in due to the forces acting on the tabs, as a result of which better tensioning between the expansion sleeve and the borehole wall is achieved.
- the expansion sleeve is thereby better centered when it is driven into the borehole, so that an undesired overlapping of the expansion sleeve over the shoulder region of the shaft is thereby also avoided.
- the fastening element shown in FIG. 1 consists of a shaft 1 which has a threaded section 2 at its rear end for clamping an object and has a stepped section 3 in the front area, to which an expansion cone 4 adjoins at the end.
- an expansion sleeve 5 made of spring steel is placed, which surrounds this section 3 with radial and axial play.
- the expansion sleeve 5 has on the side shown in Figure 1 a continuous longitudinal slot 7, which allows a spring-elastic compression of the expansion sleeve 5.
- FIG. 2 shows the complete longitudinal section of the expansion sleeve 5 shown in FIG. 1.
- the spread has at the lower end sleeve 5 two opposite, inwardly bent tabs 8, 9, which abut a shoulder 10 of the shaft 1.
- the expansion sleeve 5 has a slot 12 on its rear side, which, like the longitudinal slot 7, allows the expansion sleeve 5 to be expanded in the region of the expansion cone 4.
- the expansion sleeve 5 is spread apart by pulling the expansion cone 4 into the expansion sleeve 5. This is done, for example, by first placing an object to be fastened with a hole on the threaded section 2, which protrudes from the borehole opening, and then screwing and tightening a screw nut.
- the expansion cone 4 is pulled downwards, while the expansion sleeve 5 is clamped stationary in the borehole.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
- Joining Of Building Structures In Genera (AREA)
- Piles And Underground Anchors (AREA)
- Gloves (AREA)
Abstract
Description
Die Erfindung betrifft ein Befestigungselement mit Spreizhülse gemäß der Gattung des Hauptanspruchs.The invention relates to a fastener with an expansion sleeve according to the preamble of the main claim.
Aus der DE-OS 35 26 784 ist ein Befestigungselement mit Spreizhülse bekannt, welches zur selbstklemmenden Befestigung in Bohrlöchern geeignet ist. Das Befestigungselement besitzt einen Schaft, auf den eine Spreizhülse aufgesetzt ist, die im unbelasteten Zustand geringfügig über den Schaftdurchmesser übersteht. Die Spreizhülse läßt sich federelastisch beim Einsetzen in ein Bohrloch zusammendrücken, wobei sie sich mit der Bohrlochwand verspannt. Beim Einschlagen muß daher die durch die elastische Verspannung hervorgerufene Reibungskraft überwunden werden. Dabei kann es vorkommen, daß der sich an die Spreizhülse anschließende Schaftteil ungewollt teilweise unter die Spreizhülse schiebt, insbesondere dann, wenn die Spreizhülse geringfügig verkantet an der von diesem Schaftteil gebildeten Schulter anliegt.From DE-OS 35 26 784 a fastening element with an expanding sleeve is known, which is suitable for self-clamping fastening in boreholes. The fastening element has a shaft on which an expansion sleeve is placed, which in the unloaded state projects slightly beyond the shaft diameter. The expansion sleeve can be compressed resiliently when inserted into a borehole, whereby it braces against the borehole wall. When driving in, the frictional force caused by the elastic tension must therefore be overcome. It can happen that the shaft part adjoining the expansion sleeve inadvertently pushes partially under the expansion sleeve, in particular when the expansion sleeve lies slightly tilted against the shoulder formed by this shaft part.
Der Erfindung liegt die Aufgabe zugrunde, die als Federhülse ausgebildete Spreizhülse so auszubilden, daß sie sicher am angrenzenden Schaftteil beim Einschlagen in ein Bohrloch anliegt.The invention has for its object to design the expansion sleeve designed as a spring sleeve so that it rests securely on the adjacent shaft part when driving into a borehole.
Die Lösung dieser Aufgabe wird durch die im Hauptanspruch angegebenen Merkmale erhalten. An der Spreizhülse sind nach innen abgewinkelte Laschen ausgebildet, die beim Einschlagen des Befestigungselements an einer Schulter des Schaftes sicher anliegen. Die Spreizhülse wird durch die nach innen gebogenen Laschen in diesem Bereich verjüngt, wodurch sichergestellt ist, daß auch bei unregelmäßig verlaufenden Bohrlöchern die Spreizhülse nicht über den angrenzenden Schulterbereich des Schaftes übergreift. Weiterhin haben die nach innen gebogenen Laschen den Vorteil, daß die Spreizhülse sich beim Einschlagen aufgrund der an den Laschen angreifenden Kräfte nach außen auszubuchten versucht, wodurch eine bessere Verspannung zwischen Spreizhülse und Bohrlochwan dung erreicht wird. Gleichzeitig wird dadurch die Spreizhülse beim Einschlagen in das Bohrloch besser zentriert, so daß auch dadurch ein unerwünschtes Übergreifen der Spreizhülse über den Schulterbereich des Schaftes sicher vermieden wird.This object is achieved by the features specified in the main claim. Inwardly angled tabs are formed on the expansion sleeve, which rest securely on a shoulder of the shaft when the fastening element is driven in. The expansion sleeve is tapered in this area by the inwardly bent tabs, which ensures that the expansion sleeve does not overlap over the adjacent shoulder area of the shaft, even in the case of irregularly extending drill holes. Furthermore, the inwardly bent tabs have the advantage that the expansion sleeve tries to bulge outwards when driven in due to the forces acting on the tabs, as a result of which better tensioning between the expansion sleeve and the borehole wall is achieved. At the same time, the expansion sleeve is thereby better centered when it is driven into the borehole, so that an undesired overlapping of the expansion sleeve over the shoulder region of the shaft is thereby also avoided.
Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.The invention is explained in more detail below with reference to an embodiment shown in the drawing.
Es eigen:
- Figur 1 ein Befestigungselement mit Spreizhülse,
Figur 2 einen Längsschnitt durch die in Figur 1 verwendete Spreizhülse und- Figur 3 eine Seitenansicht der in Figur 1 verwendeten Spreizhülse.
- FIG. 1 shows a fastening element with an expanding sleeve,
- Figure 2 shows a longitudinal section through the expansion sleeve used in Figure 1 and
- Figure 3 is a side view of the expansion sleeve used in Figure 1.
Das in Figur 1 dargestellte Befestigungselement besteht aus einem Schaft 1, der an seinem hinteren Ende einen Gewindeabschnitt 2 zum Festspannen eines Gegenstandes aufweist und im vorderen Bereich einen abgesetzten Abschnitt 3 hat, an den sich zum Ende hin ein Spreizkonus 4 anschließt. Im abgesetzten bzw. verjüngten Abschnitt 3 ist eine aus Federstahl bestehende Spreizhülse 5 aufgesetzt, die mit radialem und axialem Spiel diesen Abschnitt 3 umschließt. Zwischen Spreizhülse 5 und dem verjüngten Abschnitt 3 besteht ein Freiraum 6.The fastening element shown in FIG. 1 consists of a shaft 1 which has a threaded
Die Spreizhülse 5 besitzt auf der in Figur 1 dargestellten Seite einen durchgehenden Längsschlitz 7, der ein federelastisches Zusammendrücken der Spreizhülse 5 zuläßt.The
In Figur 2 ist der vollständige Längsschnitt der in Figur 1 dargestellten Spreizhülse 5 gezeigt. Am unteren Ende besitzt die Spreiz hülse 5 zwei gegenüberliegende, nach innen gebogene Laschen 8, 9, die an einer Schulter 10 des Schaftes 1 anliegen. An der in Figur 1 nicht sichtbaren Rückseite der Spreizhülse 5 steht nach außen ein Steg 11 ab, der eine zusätzliche Rutschsicherung im Bohrloch darstellt. Mit der abstehenden Kante des Steges 11 kann dieser in die Bohrlochwand wie ein Widerhaken eingreifen, so daß die Spreizhülse 5 sicher im Bohrloch gehalten wird.FIG. 2 shows the complete longitudinal section of the
Wie in Figur 2 ersichtlich ist, besitzt die Spreizhülse 5 an ihrer Rückseite einen Schlitz 12, der ebenso wie der Längsschlitz 7 ein Aufspreizen der Spreizhülse 5 im Bereich des Spreizkonus 4 zuläßt. Das Aufspreizen der Spreizhülse 5 wird durch Einziehen des Spreizkonus 4 in die Spreizhülse 5 erreicht. Dies geschieht beispielsweise dadurch, daß auf den Gewindeabschnitt 2, der aus der Bohrlochöffnung herausragt, zunächst ein zu befestigender Gegenstand mit einer Bohrung aufgesetzt wird und dann eine Schraubenmutter aufgeschraubt und angezogen wird. Dabei wird der Spreizkonus 4 nach unten gezogen, während die Spreizhülse 5 ortsfest im Bohrloch verspannt ist. Je stärker die Schraubenmutter angezogen wird, desto weiter wird der Spreizkonus 4 nach unten in die Spreizhülse 5 gezogen, so daß eine entsprechend starke Aufspreizung der Spreizhülse 5 erreicht wird. Durch die Aufspreizung der Spreizhülse 5 wird eine sichere Befestigung des Befestigungselements im Bohrloch erreicht, welches hohen Zugbelastungen standhält.As can be seen in FIG. 2, the
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89105407T ATE68854T1 (en) | 1988-05-24 | 1989-03-28 | FASTENING ELEMENT WITH EXPANDING SLEEVE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3817512 | 1988-05-24 | ||
DE3817512A DE3817512A1 (en) | 1988-05-24 | 1988-05-24 | FASTENING ELEMENT WITH SPREADING SLEEVE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0343342A1 true EP0343342A1 (en) | 1989-11-29 |
EP0343342B1 EP0343342B1 (en) | 1991-10-23 |
Family
ID=6354964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89105407A Expired - Lifetime EP0343342B1 (en) | 1988-05-24 | 1989-03-28 | Fastener with an expanding sleeve |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0343342B1 (en) |
JP (1) | JPH0637882B2 (en) |
AT (1) | ATE68854T1 (en) |
BR (1) | BR8902374A (en) |
DE (2) | DE3817512A1 (en) |
DK (1) | DK168800B1 (en) |
ES (1) | ES2027809T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107687470A (en) * | 2017-08-18 | 2018-02-13 | 安徽信息工程学院 | A kind of antitheft antidetonation setscrew |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4306869C2 (en) * | 1993-03-05 | 2002-01-24 | Toge Duebel A Gerhard Kg | Fastening device for fixing in a hole in solid material, in particular concrete |
DE19531693A1 (en) * | 1995-08-29 | 1997-03-06 | Toge Duebel A Gerhard Gmbh | Fastening element with anchor bolt and clamping wedge |
DE29517805U1 (en) * | 1995-11-10 | 1996-01-04 | Upat Gmbh & Co, 79312 Emmendingen | Fastener for driving into a borehole |
DE29813932U1 (en) * | 1998-08-04 | 1999-12-09 | fischerwerke Artur Fischer GmbH & Co. KG, 72178 Waldachtal | Expansion anchor |
DE19936090A1 (en) * | 1999-07-30 | 2001-02-01 | Fischer Artur Werke Gmbh | Metal fastener |
DE102007058772A1 (en) | 2007-12-06 | 2009-06-10 | Fischerwerke Gmbh & Co. Kg | Anchor and assembly tool for the anchor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3303602A1 (en) * | 1983-02-03 | 1984-08-09 | Upat Gmbh & Co, 7830 Emmendingen | FLAG ANCHOR |
DE3502607A1 (en) * | 1985-01-26 | 1986-07-31 | Wolfgang 7000 Stuttgart Kreikler | Anchor, in particular load-dependent dowel |
DE3526784A1 (en) * | 1985-06-29 | 1987-01-08 | Fischer Artur Werke Gmbh | FASTENING ELEMENT WITH SPREADING SLEEVE |
US4773803A (en) * | 1985-12-12 | 1988-09-27 | Hilti Aktiengesellschaft | Expansion dowel assembly with extension on expansion member |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3448651A (en) * | 1967-06-02 | 1969-06-10 | Usm Corp | Expansion bolts |
DE2161224A1 (en) * | 1971-12-09 | 1973-06-20 | Roy Seetaram | Captive fastening element |
FR2351298A1 (en) * | 1976-05-11 | 1977-12-09 | Prospection & Inventions | Self expanding anchor bolt - has locking device shaped to ensure contraction of anchoring section |
JPS53143964U (en) * | 1977-04-19 | 1978-11-13 | ||
DE8506519U1 (en) * | 1985-03-07 | 1985-05-09 | Schneider, Josef, 7465 Geislingen | Anchor bolts |
JPS6218413U (en) * | 1985-07-17 | 1987-02-03 |
-
1988
- 1988-05-24 DE DE3817512A patent/DE3817512A1/en not_active Withdrawn
-
1989
- 1989-03-28 ES ES198989105407T patent/ES2027809T3/en not_active Expired - Lifetime
- 1989-03-28 AT AT89105407T patent/ATE68854T1/en not_active IP Right Cessation
- 1989-03-28 DE DE8989105407T patent/DE58900396D1/en not_active Expired - Lifetime
- 1989-03-28 EP EP89105407A patent/EP0343342B1/en not_active Expired - Lifetime
- 1989-04-06 DK DK165689A patent/DK168800B1/en not_active IP Right Cessation
- 1989-05-23 JP JP1128008A patent/JPH0637882B2/en not_active Expired - Lifetime
- 1989-05-24 BR BR898902374A patent/BR8902374A/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3303602A1 (en) * | 1983-02-03 | 1984-08-09 | Upat Gmbh & Co, 7830 Emmendingen | FLAG ANCHOR |
DE3502607A1 (en) * | 1985-01-26 | 1986-07-31 | Wolfgang 7000 Stuttgart Kreikler | Anchor, in particular load-dependent dowel |
DE3526784A1 (en) * | 1985-06-29 | 1987-01-08 | Fischer Artur Werke Gmbh | FASTENING ELEMENT WITH SPREADING SLEEVE |
US4773803A (en) * | 1985-12-12 | 1988-09-27 | Hilti Aktiengesellschaft | Expansion dowel assembly with extension on expansion member |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107687470A (en) * | 2017-08-18 | 2018-02-13 | 安徽信息工程学院 | A kind of antitheft antidetonation setscrew |
Also Published As
Publication number | Publication date |
---|---|
JPH0211905A (en) | 1990-01-17 |
EP0343342B1 (en) | 1991-10-23 |
DE3817512A1 (en) | 1989-12-07 |
ATE68854T1 (en) | 1991-11-15 |
DK168800B1 (en) | 1994-06-13 |
ES2027809T3 (en) | 1992-06-16 |
DE58900396D1 (en) | 1991-11-28 |
JPH0637882B2 (en) | 1994-05-18 |
DK165689A (en) | 1989-11-25 |
BR8902374A (en) | 1990-01-16 |
DK165689D0 (en) | 1989-04-06 |
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